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| author | Zachary Ware <zach@python.org> | 2021-11-24 04:41:04 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-11-24 04:41:04 (GMT) |
| commit | f9de97aae5fe9dafb58a8099171f4a09c449f4e8 (patch) | |
| tree | 379fb2cdcaa176a78e5e1202672c53ce355dfe55 | |
| parent | 9cf5646bb465b7d3d68bfe6d4711feb43d565051 (diff) | |
| download | cpython-f9de97aae5fe9dafb58a8099171f4a09c449f4e8.zip cpython-f9de97aae5fe9dafb58a8099171f4a09c449f4e8.tar.gz cpython-f9de97aae5fe9dafb58a8099171f4a09c449f4e8.tar.bz2 | |
bpo-45616: Let py.exe distinguish between v3.1 and v3.10 (GH-29731)
| -rw-r--r-- | Misc/NEWS.d/next/Windows/2021-11-23-11-44-42.bpo-45616.K52PLZ.rst | 4 | ||||
| -rw-r--r-- | PC/launcher.c | 11 |
2 files changed, 14 insertions, 1 deletions
diff --git a/Misc/NEWS.d/next/Windows/2021-11-23-11-44-42.bpo-45616.K52PLZ.rst b/Misc/NEWS.d/next/Windows/2021-11-23-11-44-42.bpo-45616.K52PLZ.rst new file mode 100644 index 0000000..000f2fd --- /dev/null +++ b/Misc/NEWS.d/next/Windows/2021-11-23-11-44-42.bpo-45616.K52PLZ.rst @@ -0,0 +1,4 @@ +Fix Python Launcher's ability to distinguish between versions 3.1 and 3.10 +when either one is explicitly requested. Previously, 3.1 would be used if +3.10 was requested but not installed, and 3.10 would be used if 3.1 was +requested but 3.10 was installed. diff --git a/PC/launcher.c b/PC/launcher.c index fbfb49a..f8b8a3d 100644 --- a/PC/launcher.c +++ b/PC/launcher.c @@ -542,8 +542,17 @@ find_python_by_version(wchar_t const * wanted_ver) } for (i = 0; i < num_installed_pythons; i++, ip++) { n = wcslen(ip->version); - if (n > wlen) + /* + * If wlen is greater than 1, we're probably trying to find a specific + * version and thus want an exact match: 3.1 != 3.10. Otherwise, we + * just want a prefix match. + */ + if ((wlen > 1) && (n != wlen)) { + continue; + } + if (n > wlen) { n = wlen; + } if ((wcsncmp(ip->version, wanted_ver, n) == 0) && /* bits == 0 => don't care */ ((bits == 0) || (ip->bits == bits))) { |